1.   It only remains to add that there is - damn it - a thin grey area between the two.

2.   It remains to add only that, late last week, I learned of the Abunimah-Silva correspondence and asked NPR to explain its blacklist policy.

3.   If doubts remain about the possible transmission of the disease to humans, he added, the strict controls should be maintained.

4.   In radio broadcasts, police urged people to return to their homes and remain calm adding that there was no serious cause for alarm.